cm,
Ditto on a lot of the info covered here; 4WD + a front bucket is a must and for the money I would get around 40hp or so unless you have bigger jobs to tackle like plowing/moving a bunch or dirt around or mowing with a big bat-wing mower or somesuch.
Some things to think about:
Is the 38 acres open or wooded? Will you have livestock? Will you farm it?
IE mowing 38 acres 3 times a year can be a decent part time job. Likewise if its wooded, will you be doing a lot of clearing, building fences, maintaining roads...going on joy rides?
: )
Best wishes on your new place
If I could afford it I would get one like ahvatsa!! A nice tractor all around.